Floatingly mounted perforating apparatus



Aug. 11, 1953 I J. L. DE BOO 2,648,335

FLOATINGLY MOUNTED PERFORATING APPARATUS Original Filed March 18, 1948 i4 Sheets-Sheet l n JEROME L. 05500 D TTORNEY Aug. 11, 1953 J. DE BOO2,648,385

FLOATINGLY MOUNTED PERFORATING APPARATUS Aug. 11, 1953 J. DE BOO2,648,385,

FLOATINGLY MOUNTED PERFORATING APPARATUS Original Filed March 18, 1948 4Sheets-Sheet 5 FIG. I3

FIIIG. a

FIG. l4

Fllzs. INVENTOR JEROME L 06500 ATTORNEY Patented Aug. 11, 1953FLOATINGLY MOUNTED PERFORATING APPARATUS Jerome L. De Boo, Chicago,Ill., assignor to Teletype Corporation, Chicago, 111., a corporation ofDelaware Original application March .18, 1948, .Serial No. 15,592, nowPatent No. 2,545,198, datedMarch 13, 1951. Divided and this applicationJanuary 4, 1949, Serial No. 69,229

11 Claims. 1

This invention pertains to perforating apparatus and more particularlyto high speed telegraph tape reperforators.

This application is a division of copending application Serial No.15,592, filed March 18, 1948 now Patent No. 2,545,198.

The principal object of this invention is to provide a perforatingapparatus wherein the material being perforated may be advanced duringthe punching cycle.

For some time it has been sought to obtain a simplified telegraph tapereperforator in an effort to reduce the manufacturing costs. Thereperforators in common use at the present time include a punch and dieunit which requires very close tolerances in its manufacture, andconsequently manufacturing costs are high. It is, therefore, anotherobject of this invention to provide a reperforator wherein greatertolerances are allowable in the punch and die unit, thus re ducing thecost of manufacture.

By this invention a high speed selector mechanism controls the selectionof a plurality of punches in accordance with signals received by theselector mechanism. In the preferred embodiment of the invention thepunches are floatingly mounted in slots in a stationary punch block.When the punches are selected in accordance with the signals received bythe selector mechanism, the selected punches are caused to perforate atelegraph tape. Thereafter the tape is advanced simultaneously as thepunches are withdrawn from the tape, :which. causes the punches to bemoved pivotally until they are withdrawn from the tape.

Therefore, another object of the invention is to combine a high speedtape perforating mecha nism with a high speed selector mechanism.

Still another object of the invention is to provide a reperforatorhaving pivoted floating punches whereby the punches may move with theadvancing tape.

In a modified form of the invention the punch block is mounted pivotallyin order that it can be moved as the punches are advanced towards thetape during the perforating operation. By this form of the invention,the tape is advanced during the perforating movement of the punches, aswell as while the punches are being withdrawn from the tape. Thus it ispossible to increase the speed of the perforating operation since it isunnecessary that there be separate punching and tape feeding operations.

Therefore, a further object of the invention is to provide -areperforator wherein both the 2 punches and the die are pivoted in orderthat they may move with the advancing tape.

'A still further object of the invention is to provide a manuallyoperated backspace mechanism in a reperforator having a pivoted punchand die unit.

Other objects and advantages not specifically recited above will beapparent and the invention will be better understood by reference to thefollowing detailed description when considered 'in conjunction with theaccompanying drawings, wherein:

Fig. l is a fragmentary isometric view showing the principal features ofthe preferred embodiment of the invention;

Fig. 2 is a front elevational view of the reperforator with the frontportion of the supporting frame removed for a better view of the'features of the invention;

Fig. 3 is a detail fragmentary isometric view of the selector magnet andarmature and the armature locking mechanism;

Fig. 4 is a detaillisometric view of the punches;

Fig. 5 is a transverse view of a section of tape perforated by punchesof the type shown in Fig. 4;

Fig. 6 is a front elevational view of a modified form of the inventionshowing permissively actuated punch interponents and a pivoted punchblock;

Fig. 7 is a fragmentary isometric view of the tape feed and backspacemechanism used in the modified form of the invention shown in Fig. 6;

Fig. 8 is a side elevational view of the pivoted punch block andbackspace mechanism shown in Fig. 7;

Fig. 9 is a timing diagram of the various operations of the preferredembodiment of the invention;

Fig. 10 is a view of several differently shaped punches suitable for usewith the invention; and

Figs. 11, 12, 13, and 14 show various types of punch and die wheels forrolling in the feed holes in a telegraph tape.

This invention incorporates a high speed selector mechanism of the typedisclosed in the patent to W. J. Zenner, No. 2,339,313, issued January18, 1944. In the invention herein described a series of selector leversmove to a permutation of marking and spacing positions depending uponthe signals received by a selector magnet. When any of the selectorlevers move'into marking position, cooperating selector interponentsalso move into marking position. Subsequent rotation of the selectorcams causes both the selector levers and selector interponents to bemoved. to positions to set a corresponding group of punch interponents.Thereafter the selector levers and selector interponents return tonormal position, thus providing for overlap. A punch bail engages andmoves the punch interponents whereby those punch interponents which arein marking position engage and in turn actuate corresponding punches toperforate a telegraph tape. The punches are held in position fioatinglyand pivotally by tension springs. As the punches are being withdrawnfrom the tape, the tape is advanced, and due to the freedom of thepunches to pivot, they are carried along with the tape until withdrawntherefrom, and immediately upon such withdrawal they are snapped back tonormal position by their tension springs.

Many features included in the disclosure of the present application arealso disclosed and are claimed in the copending application of W. J.Zenner, Serial No. 15,653, filed March 18, 1948, now Patent No.2,490,608.

Referring to the drawings the punching unit is supported in a pair ofside plates of the main frame, shown only fragmentarily in Figs. 1 and4. The selector cams indicated generally by numeral l2 and the variousother operating cams are mounted to sleeves which are rotatable about ashaft l3 which is journalled frictionlessly in a pair of brackets |4suitably secured to a base (not shown) The shaft I3 is rotatedcontinuously in a clockwise direction by means of a gear I6 which isdriven continuously by a suitable source of power (not shown).

A selector cam sleeve H is mounted rotatably about the shaft l3 and isintegral with a driven member (not shown) of a single revolutionselector clutch, the driving drum of which is represented by numeral [8.This clutch whose driving member I8 is secured to the continuouslyrotating shaft I3 is preferably of the type disclosed in the copendingapplication of A. N. Nilson et al., Serial No. 707,176, filed in theUnited States Patent Oflice on November 1, 1946, now Patent No.2,568,249.

The selector cam sleeve carries the usual series of five selector cams2|, 22, 23, 24 and 25. For the sake of clarity in the drawings only thefifth selector cam 25 is shown in Fig. 1; however, the contour of all ofthese cams is clear from the timing diagram shown in Fig. 9.

A selector magnet 21 is mounted suitably on the main frame of thereperforator and a selector armature 28 cooperates with the magnet 21.The armature 28 is biased by a spring 29 whereby the left end thereof,Figs. 2 and 3, is held in its lower or spacing position when the magnet21 is de-energized. Energization of the magnet 21 causes it to pull upthe armature 28 to marking position.

A lever 3| is mounted pivotally on a shaft 32 and is urged continuouslyin a clockwise direction by a spring 33. The lever 3| has a shoulder 34thereon which is adapted to engage and be blocked by the armature 28when it is in marking position, but when the armature 28 is in spacingposition the lever 3| may be pivoted clockwise by its bias spring 33. Aselector clutch trip off lever 36 is mounted pivotally on a shaft 31suitably secured to the main frame, and carries a pair of pins 38 and 39which cooperate with the lever 3| in a manner whereby pivotal movementof the lever 3| pivots the selector clutch trip off lever 36. The tripofi" lever 36 has a foot 4| which cooperates with a clutch lever (notshown) on the driven member of the Selector clutch. When the trip offlever 36 is pivoted clockwise the foot 4| releases the clutch leverallowing the driven member and selector cam sleeve I! to be rotated. Aselector clutch trip off cam 42 on the selector cam sleeve cooperateswith a lug 43 on the trip off lever 36, the low portion 44 of the cam 42presenting itself opposite the lug 43 upon the completion of eachrevolution of the selector cam sleeve IT. The cam 42 holds the lever 3|out of engagement with the armature 28 except during the stop and startimpulses. The stop impulse of each telegraph signal being a markingimpulse, it is apparent that the foot 4| will engage the clutch lever atthe end of each signal to stop rotation of the transmitting cam sleeve.The start impulse of each telegraph signal being a spacing impulse, itis also apparent that the transmitting cam sleeve will be released forrotation upon the receipt of each start impulse.

A pair of armature locking levers 4'3 and 41 are mounted pivotally on ashaft 43 and each is biased clockwise by an individual spring 53. Bothof the locking levers have a lug 52 which cooperates with an individuallocking cam 49. The locking lever 4'6 has a stepped shoulder 54 theeronfor locking the armature 28 in spacing position and the locking lever4'1 has a stepped shoulder 55 for locking the armature 23 in markingposition. As is apparent from Fig. 9 the cam 49 has a contoured surfacewhich allows the armature 28 to be held in whichever position it assumesin response to the signal impulses received by the magnet.

The five selector cams 2| through 25 cooperate with a series of fiveselector levers BI, 62, 63, S4, and 55. Each of the selector levers 6|through 65 is mounted pivotally on a shaft 51 suitably secured to theframe and is yieldable thereon due to the action of individual bars 45,slidable in apertures 55 in a plate 66 secured suitably to the frame,and individual leaf springs 18 which continuously urge the selectorlevers towards the shaft 61' (Fig. 2). Each of the selector levers isbiased in a clockwise direction by an individual tension spring 68. Eachof the selector levers has a lug 69 which follows the correspondingselector cam. When the armature 28 moves to marking position in responseto one of the signal impulses the locking lever 4! momentarily locks thearmature 28 in such marking position during which time the selectorlever opposite the low part of the corresponding selector cam movesbeneath the armature 28. When the armature 28' is moved to spacingposition in response to a signal. impulse the locking lever 46momentarily locks the armature 28 in spacing position. When the armatureis thus moved and held in spacing position the selector lever oppositethe low part of the corresponding selector cam is blocked by thearmature 28 and the lug E9 is prevented from dropping into the low partof such cam.

A series of selector interponents '1 i, only one of which is shown, haveslots 12 therein and are slidable longitudinally. A comb bar T3 securedsuitably to the main frame has slots in the transverse edges thereofwhich position transversely the selector interponents The comb bar 13fits loosely within the slots i2 of each selector interponent H allowingeach selector interponent H a slight degree of pivotal movement. A shaft14 suitably secured to the main frame limits the clockwise pivotalmovement of the selector interponents H and a series of springs 15secured suitably to the main frame continuously urges punch bail I I.

theselector interponents II ina clockwiserdirection.

Each selectorinterponent II cooperates with a corresponding one of theselector levers BI through 65 whereby afoot TI on veach selectorinterponent 'II remains on top of thecorresponding selector leverwhenever a spacing impulse 'con trols such selector lever and dropsbehind the selector lever when a marking impulse controls it. Referringto the selector cam 25, selector lever 65 and theselector interponent IIin the fifth position, when the foot 11 drops behind the selector lever65 in the manner described,.subsequent rotation of the cam sleeve I'Ibrings an extra high portion I8 :of the selector earn 125 against thelug 69 which pivotstheselector lever 65 counterclockwise thereby movingthe selector 'interponent II tothe left to setxa corresponding punchinterponent 85 of a series of punch interponents BI, 82, B3, 84'and85.

A latch bail 87 secured pivotally to the main frame at points 88 andbiased in a clockwise direction by a spring 89.is adapted to latch atooth 99 on any of the punch interponents BI through 85 moved by theselector interponents II in the above-described manner. A bell cranklever III secured pivotally to the main frame by a bolt 92 has a camfollower 93 which follows a punch interponent release cam 94. Thefollower 93 is continuously urged against the cam '94 due to the actionof a tension spring 96 suitably secured to the main frame. An upturnedend portion 9'! of the bell crank lever 9| cooperates with a lug 98 onthe latch ball 31 to disengage the latch bail 8'! from the punchinterponents -8I through 35 when the high part of the cam 94 is oppositeth follower 93.

When all of the punch interponents BI through 85 have been set due tothe action of the extra high portions on the selector cams 2| through25, a bail 56 is actuated to disengage theselector interponents II fromthe selector levers 6| through 65. The bail 56 consists of an L-shapedmember pivoted to the main frame by a bolt 51 and is continuously urgedin a counterclockwise direction by a spring 58. The ball 56 has a camfollower 59 thereon adapted to ride a cam 60. As the cam 60 rotates, thehigh portion thereof, upon engagement with the cam follower 59,pivots-the bail 56 against the action of the spring 58 to erase anyselection existing in the set of selector interponents II by moving themall to spacing position preparatory to the next selection to be set uptherein.

Each of the punch interponents B-I through 85 is supported in a punchbail I III A pair of comb bars I92 and -I I33, integralparts of thepunch bail ItI position transversely the punch interponents and allowthem to slide longitudinally in the A set of tension springslllesecuredsuitably to the punch bail IIlI urge the punch interponents 8I through85 to the right or spacing position. The punch bail IOI .is supportedpivotally in the side plates I I by a pair of pivot bolts IM and isactuated pivotally about bolts IM by a toggle mechanism indicatedgenerally by reference vnumeral I01.

A punch clutch actuating cam I08 mounted on the selector cam sleeveII-controls a single revolution punch clutch I09. The clutch I09 ispreferably of the same type as the selector-clutch, the driving drum ofwhich is indicated by numeral I8. The clutch I89 has a driving drum I IIwhich is secured to the continuously -.rotating shaft I3 and-cooperateswith a driven member -I I2 secured to 'a sleeve H3 freely rotatable on.the shaft I3. A punch clutch trip off lever IE4, secured to a shaft IIBmounted pivotally in the side plates II, cooperates with a clutch leverIII to trip off the punch clutch I09. A cam follower lever I I8 securedto the shaft I I6 is continuously urged in a counterclockwise directionby a spring I I9 whereby a follower I2I is held in engagement with thepunch clutch actuating cam I88. When the high portion of the cam Hi8resents itself to the follower I2I the shaft IIG is rotated clockwisesufficiently to pivot the trip off lever II' I from engagement with theclutch lever III thereby releasing the clutch I69 for rotation. It

is, therefore, clear that the punch clutch I09 is only tripped off whenthe selector clutch has been tripped off previously.

A punch eccentric I22 is secured to the sleeve .II3 and as the puncheccentric I22 rotates it substantially .reciprocates a lever I23. Thelever I23 is secured pivotally by a bolt I24 to one arm of a U-shapedlever I26 and is adapted to oscillate pivotally the U-shaped lever I26about a bolt I21 secured rigidly to the reperforator frame. The otherarm of the U-shaped lever I26 is connected pivotally to a link I28 by abolt I29 whereby reciprocation of the lever I23 is transferred to thelink I23. The link I28 is secured toa shaft I 3I which actuates thetoggle mechanism IIJ'I.

Abeam I32 is mounted rotatably between the side plates II on a shaftI33. A U-shapcd lever I34 secured to the beam I32 has a pair of arms I36and I3! which are secured pivotally to the shaft I3I. Adjacent the armsI35 and IN are a pair of levers I33 and I39 also pivoted to the shaft-I3I. The levers I38 and I39 are secured pivotally at the opposite endsthereof to the punch bail IIJI by a pair of bolts MI. As the link I28moves to the left straightening the toggle mechanism consisting of thearms I36 and I3! and the levers I38 and I39, the punch bail IfiI israised and conversely as the'link I28 is moved to the right the togglemechanism breaks and the punch bail IIII is lowered.

A punch block I4? is supported rigidly between the side plates II andhas a series of open faced slots I43 within which a series of punchesI'M are reciprocable. A comb bar I46 sup-ported between the side platesII serves to guide the punches I44 and acts as a stop for the punches,engaging a shoulder I4? on each punch IM as the punch is lowered. A dieplate M8 is bolted to the punch block I42 and has a series of open facedslots (not shown) within which the punches I44 extend during th upwardmovement thereof. Each punch I46 is held within its slot M3 by a springI49 which is secured to a bar I5I suitably mounted between the sideplates II. The punches Hi4 are therefore floatingly mount ed in thepunch block I42.

A shaft I54 mounted between the side plates supports a rotatable sleeveI55. A tape feed hole punch wheel I55 is secured to the sleeve I55, anda series of feed hole punches I51 formed on the periphery of the wheelI55 mesh with die holes I58 spaced uniformly around the periphcry of adie wheel I59 freely rotatable on a shaft I60. Rotation is imparted tothe punch wheel I56 and die wheel I53 by means of a ratchet wheel I Msecured to the sleeve I 55; A tape guide wheel I62 having a shoulder I63around the periphery thereof is also mounted on the sleeve I55. A tapefeed guide I64 guides a tape I36 into position where it is engagedby thefeed hole punch wheel I56 and the tape guide wheel I62 and as the feedhole punch wheel I56 and the die wheel I59 mesh with the tape I66therebetween a series of uniformly spaced feed holes are punched in thetape I 66. The correct transverse position of the feed holes in the tapeI66 is maintained by the tape guide wheel I62 as the edge of the tapeI66 abuts the shoulder I63. The tape is then advanced through a slot(not shown) between the punch block I42 and the die plate I48.

The ratchet wheel I6I is rotated by means of a pawl I61. The pawl I61 issecured pivotally by a bolt I68 to an extended portion I69 of the armI36 and is biased in a counterclockwise direction by a spring I1Isuitably secured to the main frame. A detent lever I12 is securedpivotally to the side plate II by a bolt I13 and is biased in acounterclockwise direction by a spring I14. The detent lever I12 carriesa detent roller I16 which engages the ratchet wheel I6I between theteeth on the periphery thereof to prevent backward rotation of theratchet wheel I6I while the feed pawl I61 is being returned preparatoryto making another stroke. As the toggle mechanism I61 is straightened toactuate the punch bail IflI, the extended portion I69 on the arm I36 ispivoted counterclockwise which pulls down the feed pawl I61 causing itto slip over one of the teeth on the ratchet wheel I6I and thereafter asthe toggle I61 breaks, the feed pawl I61 is moved up to step the ratchetwheel I6I, after which it is held in stepped position by the detentroller I16.

When the punch bail IIlI is raised extended portions I11 on each of thepunch interponents 8| through 85 which have been previously moved tomarking position engage shoulders I18 on corresponding punches I44 toraise these punches forcing the cutting edges thereof through the tapeI66. Thereafter as the punch bail IUI is lowered the tape I66 isadvanced and the punches I44 which were raised to tape piercing positionare carried along and pivoted counterclockwise to the dotted positionI19 shown in Fig. 2. As the punch bail IUI is lowered the extendedportion I11 on each of the selected punch interponents 8| through 85engages a foot I8I on each punch I 44 to withdraw the punches I44. Theperforations thus left in the tape I66 after the punching operations areof the well known chadless type wherein the portions of the tape punchedout remain hinged to the tape iving the appearance of trap doors. Fig.shows an example of the tape perforated by the above describedreperforator.

A brief description of the operation of the invention follows. Theselector magnet 21 is energized and de-energized in accordance with thesignals received thereby from a distant transmitter (not shown). Thearmature 28 is accordingly pulled up when the magnet 21 is energized andallowed to fall due to the urging of the spring 29 when de-energized.Normally when no signals are being received the magnet 21 is energizedas the transmitter sending the signals is in its stop position, amarking position. The armature 28, being pulled up, blocks the shoulder34 to prevent pivotal movement of the selector clutch trip off lever 36thus preventing rotation of the selector cam sleeve I1. When a startimpulse is received, being a spacing impulse, the magnet 21 isde-energized which allows the armature 28 to move to spacing position.At this time, the low portion of the cam 8 44 being opposite the lug 43and the shoulder 34 being unblocked, the selector clutch trip off lever36 pivots clockwise to trip oif the selector clutch.

After the start signal is received by the selector magnet 21, fivepermuted marking or spacing impulses are received in timed relation tothe presentation of the low portions of the selector cams 2I through 25to the cooperating lug followers 69 on the selector levers 6| through65. Each marking or spacing impulse is received shortly prior to thepresentation of the low part of the selector cams to the lug followers69 and is received just prior to the presentation of one of the lowportions of the locking cam 49. This allows the armature 28 to respondto the impulse and to be thereafter locked by the locking lever 46 ifthe impulse is a spacing impulse and by the locking lever 41 if it is amarking impulse. The armature 28 being locked in this manner assuresthat it will be in the correct position to properly control the settingof the selector levers 6I through 65. The locking lever 46 or 41 whosefollower 52 has entered one of the low portions of the locking cam 49 isurged counterclockwise (Fig. 2) after each signal impulse is received bythe proper selector levers 6I through 65 in order to allow the armature28 to respond to the subsequent impulse received by the magnet 21.

The selector interponents 1I cooperating with the selector levers whichhave been moved to marking position drop behind the correspondingselector levers, and. the selector interponents 1I cooperating withselector levers which are in spacing position remain on top of thecorresponding selector levers. When the selection of the selector levershas been made, extra high portions of the selector cams 2I through 25move the selector levers counterclockwise beyond the normal positionsthereof. When the selector levers are moved in this manner, the selectorinterponents H which have dropped behind the selector levers are movedfurther to the left and those selector interponents H which arepositioned on top of their corresponding selector levers remain in therightward position thereof (Fig. 2), the selector levers merel slidingbeneath the feet 11.

As the selector interponents 1I move to the left in this manner theyengage and push corresponding punch interponents 8I through to the leftwhereby the teeth 99 on the punch interponents so moved slip beneath andare thereafter latched by the latch bail 81. The punch interponents 8Ithrough 85 having been latched in marking position, the selectorinterponents 1I return to the right due to the action of the springs 16when the bail 56 is actuated by the cam 60. Shortly thereafter theselector interponent release bail 56 is pivoted clockwise by the cam 60to lift all of the selector interponents 1I previously moved to markingposition, leaving them on top of the selector levers, thus erasing theselection existing therein. By this time the selector cam sleeve I1 hascommenced a second revolution and the signal received during the firstrevolution thereof is stored in the punch interponents 8| through 85.

The extended portions I11 on the punch interponents 8I through 85 whichhave been moved to the left (Fig. 2) or marking position are inpositions for actuating their respective corresponding punches I44 whenthe punch interponents are raised. The toggle mechanism I01 for raisingthe punch bail IOI commences acr a e g. straightening at substantiallythe same time that the punch interponents are selectively positioned bythe selector interponents I I, and is completely straightened at a timebetween the selection of the first and second impulses of the nextsucceeding signal. During the period when the toggle IU'I isstraightening, the feed pawl I6! is being backed up and the feed holepunch Wheel I56 is rendered stationary by the detent I12 cooperatingwith the ratchet wheel I6 I.

The tape I66 being stationary during the upward movement of the punchbail IOI, the selected punches I44 are engaged on their shoulders I18 bythe extended portions ll! of the punch interponents and the punches I44are therefore raised vertically, the springs I49 holding the punches I44within the slots I43 in the punch block I42. The punches I44 pierce thetape I66 leaving the chad attached thereto. Upon straightening of thetoggle IIlI, the punches I44 attain their uppermost position.Thereafter, as breaking of the toggle I! continues, the pawl I6? engagesa tooth in the ratchet wheel I6I to advance the feed hole punch wheel I56 a step.

Such movement of the punch wheel I56 causes another of the punches I51to enter one of the die holes I58 in the die wheel to punch another feedhole in the tape I66. The feed holes thus punched, like the code holespunched by the punches I44, have the chad attached to the tape. Besidespunching the feed holes in the tape I66, the feed hole punch wheel I56also advances the tape I66. The tape I66 is advanced while the punchesI44 are being withdrawn therefrom and the punches I44 are thereforecarried along with the tape I66 to the dotted position thereofrepresented by numeral I19. As the bail IEEI is lowered due to thebreakingof the toggle I61, the extended portions I" of the punchinterponents engage the feet IBI of the punches I44 to lower the punchesfrom the tape I66. The

punches I44, upon withdrawal from the tape I66 are immediately snappedback into position in the 93 pivoting the bell crank 9| clockwise toraise the latch bail 81 from engagement with the teeth The springs I6669 on the punch interponents. on each of the punch interponents then arefree to move their punch interponents to the right or unselectedposition. Thereafter the entire punch ing mechanism is ready for thenext selection.

A modification of the invention is shown in Fig. 6. In the followingdescription of this em bodiment those parts which have referencenumerals the same as parts already described are identical therewith.Only those parts are shown and described which are considerednecessary-to differentiate from the first embodiment.

The shaft I3 has the selector cam sleeve I'I therearound which is undercontrol of a selector clutch (not shown in Fig. 6). The selector camsare represented by the fifth selector cam and the selector levers arerepresented by the fifth selector lever 65. The selector levers are allmounted pivotally on the shaft 61 and are spring biased clockwise aboutthe shaft 61 by individual springs 66. When a marking impulse isreceived the armature 2B is pulled up (as illustrated) by the magnet andthe selector lever 65 is allowed to be biased in a clockwise directionwhen thelug 69 engages the low part of the cam 25-.

10 1 A set of five selector interponents, represented by the fifthselector interponents 20I, are pivotal on a shaft 202, and all arespring biased clockwise about the shaft 202 by springs 263 secured tothe vertical arms 204. The shaft 202 is positioned within a cam slot 206in each selector interponent 20L Each of the cam slots 206 has an upperhorizontal portion 201 which allows the selector interponent 2M to slidehorizontally a slight amount. In normal unselected position the selectorinterponents 2Ili are resting with the right extremities thereof on topof the selector levers 65. When any of the selector levers becomeselected they move clockwise sufiicientlyto allow the rightwardextremities of the selector interponents 2I'II to slip therebehind andcome to. rest momentarily on the bail 56. Thereafter; asthe selectorcams 25 continue rotating, the extra high portions 18 thereof engage thelugs 69 to pivot the selector levers 65 counterclockwise. The upperportion of the selector levers 65 which have been moved in response to aspacing impulse slide beneath the rightward extremities of theunselectedselector interponents 26I and the selector levers 65 whichhave been moved in response to a marking impulse move the correspondingselected selector interponents 20I to the left, during Which movementthe left ends of the selector interponents are raised due to the cammingaction of the shaft 202 within the slots 266. Raising the selectorinterponents MI in this manner causesa tooth 208 on each selectedselector interponent 20I to become disengaged from a cooperating tooth269 on each corresponding-punch interponent 2 I I There are fivepunchinterponents 2H which are mounted slidably; within the punch bailIEJI by means of a pair of comb'bars- M2 and M3. Each of the punchinterponents M I has a vertiarm 2M to which is secured a spring 2I5 forbiasing; thepunch interponents 25 I to the left. Therefore when theteeth 208 on the selector interponents 2DI become disengaged from thecorresponding teeth 209'the punch interponents 2H are moved to the leftby the springs 2I5. When the punch interponents 2| I are moved in thismanner the extended portions III thereon are positioned suitably foractuating the corresponding. punches I44 asthe toggle IIl'I straightens.

A cam 2I'l secured to the punch clutch sleeve H3 cooperateswith; afollower 2I8'of a lever 2I9 mounted pivotally ati22I. A link 222 issecured pivotally at one end thereof to the lever 2I9 by a pivot bolt223 and the other end of said link 222 issecured pivotally to a lever225 by a pivot bolt 226. The lever 224 is mounted pivotally by a bolt221 carries a bail 228. The two levers Zia-and 224' are urged in acounterclockwise direction by a spring 229. When the high portion of thecam 2I'I. engages the follower fililthe two levers 2I9 and 22 i arepivoted clockwise and the bail 228 is moved to the right. The bailailengages a lug 261 on each of the previously selectedpunchinterponents 2H and moves the punch interponentsvto the right where theyare latched by the teeth 208 and 269. The teeth 268; and 269 each havecam surfaces thereon and the punch interponent 2I I can move verticallysufiiciently in the slots in the comb bar 2I3 so that the tooth 209 canslip past the tooth 208.

Shortly after the selection set up in the selector interponents MI istransferred to the punch interponents 2| I the bail 56 is raised in themanner hereinbefore described to strip the selector interpcnents 28Ifrom behind the selector levers 69 and thereby erase the selectionexisting in the selector interponents 2!. A subsequent revolution of theselector cam assembly produces a new selection in the selectorinterponents 2M. Just prior to a complete break of the toggle I81 to theposition thereof shown in Fig. 6 the high portion of the cam 2I1 engagesthe follower 2I8 causing the punch interponents 2 II to be moved to theright and latched in unselected position. Thereafter the follower 2I8rides oh the high portion of the cam 211 and the spring 229 causes thebail 228 to be withdrawn from the teeth 23I. The new selection, havingbeen set up in the selector levers 65 and selector interponents 28I, isthen transferred to the punch interponents 2II in the manner previouslydescribed.

In this modification of the invention a set of pivoted punches I44 aremovable within a pivoted punch block 24I (Fig. 8). A punch block frame242 is secured pivotally to the side plates II at pivot points 243 andhas the pivoted punch block 24I secured thereto. The horizontal portionof the punch block frame 242 serves as a die block 248. Horizontalextensions 244 on the punch block frame 242 have slots 246 (Fig. 6) inthe extremities thereof within which a pair of studs 241 protrude. Whenthe punch bail IOI is raised, due to the straightening of the toggleI91, the studs 241 within the slots 246 raise the horizontal extensions244 of the punch block frame 242 pivoting the punch block frame 242counterclockwise.

A pair of tape feed pawls 248 and 249 are secured pivotally to the punchbail HJI by a bolt 25I and are biased towards a feed ratchet wheel 252by a spring 253. The feed pawl 249 is adapted to engage a tooth in theratchet wheel 252 to rotatably advance the wheel 252 clockwise (Fig. 7)during the down stroke of the punch bail IOI and the feed pawl 248engages a tooth on the ratchet wheel 252 to advance the wheel 252 duringthe up stroke of the punch bail I8I. The feed ratchet wheel 252 issecured to the sleeve I55 to which is also secured the tape feed holepunch wheel I56. The feed hole punch wheel I56 cooperates with the feedhole die wheel I59 to punch feed holes in a tape advancing therebetweenin the manner hereinbefore described.

Assuming that a selection has been set up in the punch interponents 2I Ithe operation of the pivoted punch block is as follows. As the toggleI81 straightens, the punches I44 corresponding to those punchinterponents 2II which have moved to the left (Fig. 6) are raised toperforate the tape I66 (not shown in Fig. 6) as the tape moves through atape slot 254. At the same time the punch block 24! is pivoted forward(Fig. '7) carrying with it the punches I44. Also at the same time thefeed pawl 248 engages and advances the ratchet wheel clockwise toadvance the tape an amount equal to the distance the punch block 24I ispivoted. On the return stroke of the punch bail IOI, as the toggle I01breaks, the pawl 249 advances the tape further and the punch block movesback to the position shown in Fig. '7. The punches I44, being within theperforations in the tape at the start of the return stroke of the punchbail IOI, are carried along with the tape and pivot relative to thepunch block 24I until they are withdrawn from the tape, whereupon theysnap back into the normal position thereof as shown in Figs. 6 and 12 7.The holes perforated in the tape, like those perforated by thereperforator comprising the first embodiment of the invention, are ofthe chadless type.

Following is a description of a backspace mechanism for the reperforatorhaving pivoted punches and a pivoted punch block. A ratchet wheel 26I issecured to the sleeve I55 and normally rotates therewith. A manuallyoperable plate 282 has a bent over top portion 263 by means of which theplate 262 may be depressed. A pin 264 secured to the side plate IIprotrudes through a longitudinal slot 266 to guide the plate 262 when itis depressed. A wide slot 261 in the plate 262 surrounds the sleeve I55and prevents the plate 282 from moving laterally. A pin 288 secured tothe plate 262 has a spring 269 attached thereto which spring 269 is alsoattached to the pin 264 and continuously urges the plate 262 upwards. Apawl 21I is secured pivotally to the plate 262 by a bolt 212 and has adepending arm 213 having a cam surface 214 thereon which cam surface 214cooperates with an adjustable eccentric 216 secured to the side frameII. The pawl 21I also has a horizontal arm 211 which carries a spring218 secured at its other end to a horizontal arm 219 on the plate 282.The spring 218 tends to urge the pawl 21I in a clockwise directiontowards the ratchet wheel 26I but the pawl 21I is held disengaged fromthe ratchet 26 I normally due to engagement of the cam surface 214 onthe depending arm 213 with the eccentric 216. Therefore, during normaloperation the ratchet wheel 26I is free to rotate as the sleeve I55rotates.

The plate 262 carries a pin 28I substantially opposite the pin 268 whichis adapted to cooperate with the lower portions of the pawls 248 and 249when the plate 262 is depressed to cam said pawls 248 and. 249 fromengagement with the ratchet wheel 252. When the plate 262 is depressedthe pawls 248 and 249 are cammed from engagement with the ratchet wheel252 after which the cam surface 214 overrides the eccentric 216 allowingthe spring 218 to urge the pawl 21I against the ratchet wheel 26I. Uponfurther depression of the plate 262 the pawl 21I engages a tooth on theratchet wheel 26I and moves the wheel 26I counterclockwise, thus backingup the tape (not shown) over the feed hole punch wheel I56.

A chad flattener 282 has five wedge-shaped lugs 283 positioned on theunder side thereof which are aligned with the five punches I44positioned in the punch block 24I. The chad flattener 282 is formed witha pin 284 integral therewith which pin 284 is slidable longitudinally ina hole 286 through the punch block 24 I. A pin 281 secured to the punchblock frame 242 also helps to position the chad flattener 282 byextending through a hole (not shown) in the chad flattener 282. Ahorizontal arm 288 has a tension spring 289 secured thereto which spring289 is secured at its other end to the chad fiattener 282. A rod 29I ispositioned within the spring 289 to maintain the chad fiattener 282 outof engagement with the tape at all times except when a backspacingoperation is in progress.

In the operation of the chad flattener 282 during a backspace operationthe chad flattener 282 is lowered during the first part of thedepression of the plate 262 due to the urging of the spring 289. Whenthe chad fiattener 282 is lowered in this way one of the wedge-shapedlugs 283 is lowered above each row of perforations 13 in the tape intothe slots 292 in the die block 249. Further depression of the plate 262merely stretches the spring 289 and the lugs 283 are held in theirlowered position until the plate 262 is released and pulled up by thespring 269 until the rod 289 lifts the chad flattener 282.

The lids in the tape as it is being perforated are hinged at the forwardend thereof so that when the tape is backspaced the tendency is for thelids to turn upwards. However, when the Wedges 283 are brought downwardsagainst the tape the lids in, the tape are directed downwards into theapertures in the tape so that when the tape is backed up by thebackspace mechanism the lids will not interfere.

In Fig. 10 there are shown several different shapes of punches 30!, 302,393, and 394 all of which may be used with the invention. The punchindicated by reference numeral 33: produces a chadless tape withapertures having round backs. The punch 392 produces a square aperturein the tape like that shown in Fig. 5. The punch 303 produces a holesubstantially round except for a narrow lid. The punch 3M merely piercesthe tape.

Figs. 11, l2, l3, and 14 show various types of tape feed hole punchwheels and die wheels. In Fig. 11 a feed wheel 306 has round feed holepunches 397 which mesh with elliptically shaped die holes 398 in a diewheel 309. In Fig. 12 a feed wheel 3 H has square feed hole punches 3l2adapted to enter a peripheral groove 313 in a di wheel 31. Fig. 13 showsa feed wheel 3l5 having square feed hole punches 3!! which mesh withsubstantially square holes am in a die wheel 359. Fig. 14 shows a feedwheel 32I having needle pointed punches 322 which mesh withsubstantially round holes 323 in a die Wheel 3224.

Various changes and modifications may be made in the invention withoutdeparting from the scope thereof.

What is claimed is:

1. In an apparatus for perforating a control form, a plurality ofpivotally mounted punches, a die block having a plurality of open facedslots for cooperating with said punches to perforate the control form,means for normally holding the punches in a nonperforating position,toggle means for moving said punches into said open faced slots tothereby perforate the control form,

said toggle means further functioning to withdraw said punches from thecontrol form, and a rotary punch means operated by the breaking of thetoggle for punching and advancing the corn trol form while said punchesare being withdrawn therefrom, whereby said punches are pivoted againstthe effect of the holding means by the advancing control form Whilebeing moved out of said open faced slots in said die block.

2. In an apparatus for perforating a control form, a plurality ofpivotally mounted punches for perforating the control form, a pivotallymounted punch block normally positioned in nonperforating position andhaving a plurality of open faced slots for guiding said punches, meansfor normally holding the punches within the slots in nonperforatingposition, means for pivoting said punch block into perforating positionand for returning said punch block to nonperforating position, means foractuating said punches, whereby said punches are moved to perforate thecontrol form and thereafter returned to normal position, and means foradvancing the control form during the pivotal movement and return tononperforating posi on. of,- said punch block; saicl punches beingmoved-to; perforate the control form during the pivotal movement of saidpunch block and said punchesbeing returned by the holding means. tonormal-position-during the return of said punch blQQktQ nonperforatingposition, whereby said punches: are moved. pivotally against the effectof the holding, means within, said open faced slots in said punch block,by the, advancing control formduring the return'of said punches tonormal position.

3., In an: apparatus. for perforating a control form, a pivotallymounted, punch, a pivotally mounted; punch block normally positioned innoneperforating position and having an open faced slot for guiding saidpunch, means for normally retaining the punch within the open facedslot; innonperforating; position, a die block secured tosaid pivotallymounted punch block and having. an open faced slot for cooperation withsaid punch to perforate they control form, means for pivoting saidvpunch and-die blocks into perforatingposition and for returning saidpunch and die blocks to nonperforating position, means for. actuatingsaid punch, whereby said punch is moved within said open faced slots insaid punch and. die blocks toperforate the control form and thereafterreturned to normal position, and means for advancing the control formduring thepivotal movement and return'to nonperforatingx position of;said punch and die blocks; said punch being moved to perforatev thecontrol form during the pivotal movement of said punch and die blocksand said punch being returned by the retaining means to normal positionduring the return of said punch and die blocks to nonperforatingposition, whereby said punch is moved pivotally against the effect ofthe retaining means within said open faced slots in said punch and dieblocks by the advancing control'form during the returnof said punch tonormal. position.

4. In an apparatus for perforating a control form, a plurality ofpivotally mounted punches a pivotally mounted punchblock normallypositioned in nonperforating. position and having a'plurality: of openfaced slots for guiding said punches, resilient means for normallyretaining the punches within the slots in nonperforating position, a dieblock secured to said pivotally mounted punch block and having aplurality of openfaced slots for cooperating with said punchestO-PBI'fOlitS the control form, means for pivoting said-punch and dieblocks into perforating position and for returning said punch and dieblocks to. nonperforating position, means for actuating said punches,whereby said punches are moved'within said open faced slots in saidpunch and die blocks to perforate the control form and thereafterreturned to normal position, and means for advancing the control formduring thepivotal movement and return to nonporforating position of saidpunch and die blocks, saidpunches being moved to perforate the controlform during tliepivotal movement of said punch and die blocks and saidpunches being returned by theresilient means to normal po-- sitionduring the return of said punch and die blocks to nonperforatingposition, whereby said punches are moved pivotally against the effect ofthe resilient means within said open faced slots in said punch and dieblocks by the advancing control form during the return of said punchesto normal position.

5. In an apparatus for perforating a control form, a movable punch blockhaving a plurality of open faced slots therein, a punch positionedwithin each of said slots, means for retaining said punches against therear walls of said slots, means for moving said punch block into and outof perforating position, means for simultaneously moving the punchesinto and out of perforating position during the movement of the punchblock into and out of perforating position, and means for advancing thecontrol form during the movement of the punch block into and out ofperforating position, said punches being pivoted against the effect ofthe retaining means by the advance of the control form during a portionof the return movement of the punch block to the nonperforatingposition.

6. In an apparatus for perforating a control form, a pivotally mountedpunch block having a plurality of slots formed therein, a punchpositioned within each of the slots, means for urging the punchesagainst the rear walls of the slots, engaging means for moving thepunches and simultaneously pivoting the punch block into perforatingposition, means for advancing the control form during the punchingoperation in the direction of the pivotal movement of the punch block,means for subsequently withdrawing the punch block and punch from theperforating position, and means for further advancing the control formin the aforementioned direction during the return movement of thepunches and punch block to the nonperforating position.

7. In an apparatus for perforating a control form, a pivotally mountedpunch block having a plurality of slots formed therein, a punchpositioned within each of the slots, means for normally retaining thepunches in a nonperforating position against the rear walls of saidslots, means for engaging the punches, means interconnecting the punchblock and the engaging means, a toggle connected to .said engaging meansand normally broken to maintain the punches and punch block in anonperforating position, means for straightening the toggle to move thepunches and punch block into perforating position, and means forsimultaneously advancing the control form upon movement of the punchblock.

8. In an apparatus for perforating a control form, a punch block havinga plurality of slots formed therein, a punch positioned within each ofsaid slots, means for urging said punches against the rear walls of saidslots, means for engaging the punches to move them into perforatingposition, a normally broken toggle connected to the engaging means formaintaining the punches in a nonperforating position, means forstraightening and breaking the toggle to move the engaging means andpunches into and out of the perforating position, a rotary punch, aratchet for advancing the rotary punch to advance the tape, a pawloperated by the breaking of the toggle for engaging and advancing theratchet to advance the rotary punch to advance the control form duringthe return of the punches to the nonperforating position.

9. In an apparatus for perforating a control form, a plurality of firstpunches, means for normally retaining the first punches in anonperforating position, means for moving the first punches into and outof a perforating position, a rotary punch, means actuated by the firstpunch moving means during the movement of the first punches into and outof the perforated position for advancing the rotary punch to advance thecontrol form unidirectionally, control form backspacing means for movingthe rotary punch in a direction opposite to that of the advancing means,and means for disengaging the rotary punch advancing means uponactuation of the backspacing means.

10. In an apparatus for perforating a control form, a plurality ofpunches adapted to perforate lidded apertures in the control form, meansfor moving the punches into and out of a perforating position, means foradvancing the control form subsequent to each perforating operation, amechanism for disengaging said control form advancing means and movingthe control form backwards, and means rendered effective upon operationof said mechanism for guiding the lids formed during the perforatingoperation to facilitate the backward movement of the control form.

11. In an apparatus for perforating a control form, a plurality ofpivotally mounted punches, means for moving the punches into and out ofposition to perforate the control form, means for urging said punchesagainst pivoted movement during said movement of the punches into andout of perforating position, a rotary punch normally engaging saidcontrol form, means operated by the said moving means subsequent to aperforating operation for rotating the rotary punch to perforate andadvance the tape, said rotary punch causing the control form to engageand pivot the punches against the effect of the urging means, amechanism for disengaging the means for rotating the rotary punch, saidmechanism including means for rotating the rotary punch to backspace thecontrol form.

JEROME L. DE BOO.

References Cited in the file of this patent UNITED STATES PATENTS NumberName Date 85,661 Helms Jan. 5, 1869 228,866 Smith Jan. 27, 880 589,570Palmer & Denmead Sept. 7, 1897 652,754 Davis July 2, 1900 800,732Forthun Oct. 3, 1905 1,048,560 McCall Dec. 31, 1912 1,254,470 CaldwellJan. 22, 1918 1,721,486 Lautenschlager July 16, 1929 1,938,318 ColbyDec. 5, 1933 1,994,913 Howell Mar. 29, 1935 2,084,869 Rosenberg June 22,1937 2,273,265 Heyel Feb. 27, 1942 2,833,024 Mathes Oct. 26, 19432,442,567 Jesseph June 1, 1948

